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, a troubled textile industry was told to spend $2 billion combating brown-lung disease. by 1980, the supreme court was asked to choose between saving lives or jobs and profits. how much is a life worth? wilderness or minerals? guns or butter? jobs or safety? we always face choices. resources and scarcity. what's economics all about? with the help of economic analyst richard gill, we'll examine that question on economics usa. i'm david schoumacher. what's economics all about? there have always been theoretical answers to that question, but reality complicates the most elegant theories. economics usa is about theory and reality in 20th-century amica, and how people and events have shaped economic decisions that affect our lives. those decisions usually involve tradeoffs. in 1980, congress designated over 100 million acres of alaskan land as national parks and wilderness areas. why did congress make that decision? how much did it cost the nation? in 1867, when the united states purchased the territory of alaska from russia, the acquisition was derided as wasted money. a century later, after two
, rhythm, timbre, harmony, and texture. however, not all cultures see music in this way. (brown) most cultures around the world-- there's no word for music. our word music comes from the greeks, and it's something that's used in european culture, and it's used in arabic culture. so of course there's no word for melody, for rhythm, for harmony, for texture, for chord, for any of the other terms that we commonly use in the united states and europe to talk about music. but if you want to make comparisons across cultures, you need some kind of terminology to use. (narrator) a melody is a succession of pitches. it can be composed like the melody of a song, or it can be improvised like a solo in a jazz performance. rhythm refers to the time element in music such as the steady pulse of australian aboriginal clapsticks. rhythm can also be free without a regular beat like the solo shakuhachi music of japan. [resonating, airy pitches] timbre is the tone color of a musical sound. the same pitch sounds different when it is played on different instruments. this is because each instrument has its o
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